Hey guys... I'm planning to a MBP 13 but in dilemma choosing between i5 and i7 Is extra $300 worth for i7? I know mac wasn't supposed to play game at the first place but i really want to know if to play SC2 i5 and i7 really make huge differences? Can someone explain to me the real different between 2.3 i5 and 2.7 i7? Also is it worth to update to 128GB SSD for i5? thx!